196,821 research outputs found
Realization of 3D silicon structures using a DRIE technique
No full text3D manufacturing at micron scale with very low roughness is a key enabling technology for the realization of micromechanical parts both for mechanical devices and for critical components such as printer head nozzles and high precision molds. The only currently available technique in the field of IC micro technology is nanolithography by two photon absorption [1]. We report the implementation of a technique based on multiple Deep Reactive Ion Ecthing (DRIE) [2] that allows to realize complex 3D geometries in silicon with a limited number of lithographic steps. A mold is demonstrated with 1/30 aspect ratio, 6 depth levels, including wafer-through features, with a dimensional accuracy of 5um
Characterization of FBK small-pitch 3D diodes after neutron irradiation up to 3.5 × 1016 neq cm−2
No full textWe report on the characterization by a position resolved laser system of small-pitch 3D diodes irradiated with neutrons up to an extremely high fluence of 3.5 x 10(16) n(eq) cm(-2). We show that very high values of signal efficiency are obtained, in good agreement with the geometrical expectation based on the small values of the inter-electrode spacings, and also boosted by charge multiplication effects at high voltage. These results confirm the very high radiation tolerance of small-pitch 3D sensors well beyond the maximum fluences expected at the High Luminosity LHC
I granati delle Fosse di Novale (VICENZA)
No full textRecent soils derived from erosion and alteration of Eocene rocks of the Veneto Volcanic Province (NE Italy) contain detrital
millimetric garnets together with many other magmatic and metamorphic minerals, such as zircon, topaz, corundum, beryl, ilmenite and clinopyroxene. EMPA analyses on pink to dark red grains revealed two compositional types, namely almandine-rich (pink) and pyrope-rich (dark red) garnets, respectively. LA-ICP-MS data indicated that the analysed garnets are LREE-depleted, whereas heavy rare earth element (HREE) concentrations are variably enriched, according to the different colour of garnets. This means that, in terms of major elements and trace element patterns, Py-rich garnets are similar in composition to those of typical garnets from mantle-derived rocks (e.g., garnet peridotite/pyroxenite or eclogite). Alm-rich garnets are closer in composition to those of metamorphic rocks (e.g., gneisses and schists). Py-rich garnets could be transported from mantle depths to the surface by Tertiary mantle-derived alkaline basalts of the Veneto Volcanic Province, also carrying zircon megacrysts and spinel peridotite xenoliths. The source of Alm-rich garnets may be found in the crust crossed by the same magmas
A comparative evaluation of integrated capacitors for AC-coupled strip detectors
No full textNUCL. INSTR. AND METH.
Silicon pin detector with integrated JFET-based source follower
No full textA pin photodiode monolithically integrated with a bias resistor and a JFET-based source follower is presented. Results from static and dynamic characterisation of the structure are reported, together with SPICE simulations used to design an optimised device which can be fabricated in the same technology. This structure can be employed as a pixel in linear X-ray scanners for non-destructive inspection
I noduli di peridotite a spinello nel filone basaltico di Valle di Fondi (Altopiano di Asiago, Vicenza). Microstrutture, composizione e geotermometria.
No full textUltramafic xenoliths found in the mafic dyke of Valle di Fondi (Sette Comuni Plateau, NE Italy) show textural and compositional features similar to those of well-known mantle xenoliths reported for Tertiary volcanics of the Lessini Hills. The equilibration temperatures reached by minerals (Tmean=985+/-73°C) indicate that these xenoliths re-equilibrated before their incorporation by the host magma. the maximum pressure at which the xenoliths could stabilize are indicated by the composition of spinel, and vary between 1.69 and 1.77 GPa, corresponding to about 50 km in depth. Mafic magma, which originated at deeper depths, therefore pulled away fragments of upper mantle during its rapid ascent to the surface
Demonstration of 200-, 100-, and 50-mu m Pitch Resistive AC-Coupled Silicon Detectors (RSD) With 100% Fill-Factor for 4D Particle Tracking
No full textWe designed, produced, and tested RSD (Resistive AC-Coupled Silicon Detectors) devices, an evolution of the standard LGAD (Low-Gain Avalanche Diode) technology where a resistive -type implant and a coupling dielectric layer have been implemented. The first feature works as a resistive sheet, freezing the multiplied charges, while the second one acts as a capacitive coupling for readout pads. We succeeded in the challenging goal of obtaining very fine pitch (50, 100, and ) while maintaining the signal waveforms suitable for high timing and 4D-tracking performances, as in the standard LGAD-based devices
Noduli ultramafici e megacristalli nelle lave basaltiche di Salcedo (Marosticano, Vicenza).
No full textUltramafic xenoliths found in the mafic dyke of Valle di Fondi (Sette Comuni Plateau, NE Italy) show textural and compositional features similar to those of well-known mantle xenoliths reported for Tertiary volcanics of the Lessini Hills. The equilibration temperatures reached by minerals (Tmean=985+/-73°C) indicate that these xenoliths re-equilibrated before their incorporation by the host magma. the maximum pressure at which the xenoliths could stabilize are indicated by the composition of spinel, and vary between 1.69 and 1.77 GPa, corresponding to about 50 km in depth. Mafic magma, which originated at deeper depths, therefore pulled away fragments of upper mantle during its rapid ascent to the surface
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
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